Bill and Melinda Gates talk to WSJ’s Rebecca Blumenstein at the World Economic Forum in Davos about the recent drop in oil prices and the effect it will have on their clean energy initiatives. Video Wall Street Journal

Since the beginning of his presidency, President Barack Obama has vowed to close the prison at Guantánamo Bay, Cuba, which he says is expensive, unnecessary and serves as a recruitment tool for America’s enemies. Miami Herald reporter Carol Rosenberg joins Hari Sreenivasan to discuss the legal and logistical obstacles of President Obama’s goal.